Popped into RDG today (near Halifax - as I happened to be in the area) with a view to picking up some tooling... got as far as selecting stuff (MT3 collets, facemill, etc) when I asked what the drawbar thread was and was told 1/2" BSW, and they pointed out that this won't fit some Warco Mills...

Had a quick look online at the Warco website on my handheld and sure enough its all 3/8" drawbar. Since the guys at RDG couldnt tell me if my Warco would take a 1/2" drawbar I decided not to buy anything :(

Anyway, now I am back home I checked and it is indeed a 3/8" bar - the spindle will take a M12 bolt but not, I think, a 1/2" bar (I can't find my 1/2" drill to try it - its the only thing I have thats 1/2" AFAIK). I suspect its sized to take up to 7/16" as that's the drawbar for the Warco R8 verson of the spindle.

Those of you who have a Warco, can you confirm this is the case?